Improvement in safety-valves



UNITED STATES PATENT QFFIcE;

GUSTAF SWENSON, OF HACKENSACK, NENV` JERSEY.

IMPROVEMENT IN SAFETY-VALVES.

Specification forming part of Letters Patent No. 139,209, dated May 20, 1873; application led January 30, 1873.

To all whom it may concern:

Be it known that I, GUsTAr SwENsoN, of Hackensack, in the county of Bergen and State of New Jersey, have invented a new and useful Improvement .in Safety-Valves;

the inner end of a passage that connects with the water back of a cooking-range, or with the steam space of a boiler ot' any description, while from the side ot' said shell extends a spout for the discharge ot' the waste steam, and through its end opposite the cone-seat is introduced a cone-valve, the stem of which is guided in a screw-plug that lits the open end ofthe shell, and also serves to act on a spring which has a tendency to depressthe valve in its seat with more or less power, while the tension of this spring can be regulated by means of a screw-plug in such a manner that a simple, cheap, and compact safety-valve is Ohta-ined, .which can be applied to water-backs of cooking-ranges or to other boilers, and which can be easily adjusted in any desired y position.

I am aware of the construction and a-rrangementof parts shown in the safety-valve in the application of M. Woodbury, rejected and withdrawn -July 25, 1854; the same is therefore by me disclaimed. rlhe chief features of my invention are its simplicity, ease ot construction, and facility with which the parts can be removed and repaired.

In my safety-vale, the valve-stem passes up through and out of the stuffing-box, while at the extreme lower end is formed the semispherical valve, which ts a correspondinglyformed seat, while directly between said semispherical valve and the stufng-box is the re` acting spring h surrounding the valve-stem,

so that .said spring is always guided in its movement 5 and furthermore when the stuifing-box is removed, the valve, together with its spring, can be lifted out as an entirety by taking hold of the projecting valve-stem, thus facilitating repair or regrinding of the valve 5 and further, by making the valve semi-sphericalfa-nd arranging `it directly upon the lower or extreme end ot' the valve-stein, the steam entering the inlet channel c is not interrupted, as it would be it' the valve-stein extended down into said inlet or channel.

In the drawing the letter A designates the shell of my valve, which is `provided at 011e end with an external screw-thread, a, and at its opposite end with an interna-l screw-thread, b. The screw-ni pple a is bored out to form a passage, c, at the inner end of which is formed the seat d for a cone-valve, c. The stem fof 5 tends a spout, t', to carry oli' the waste steam. i

By these means a safety-valve is obtained which is very compact, and which can be readily secured in any desired place or position-such, for instance, as the water-back ot' a cookillg-range-and by applyingl my saety- Valve the danger ot' an explosion materially reduced.

What I claim as new, and desire to secure by Letters Patent, is

'lhe semi-spherical valve c, arranged upon the extreme lower end4 ofthe valve-stem f, the upper end of which projects through the stuffing-box in combination with each other, and with the spring h, shell A, and seat d, all constructed and arranged as herein shown and described, for the-purpose specified.l

This specification signed by me this 27th day of January, 1873.

GUSTAF SWENSON.

Witnesses:

W. HAUFF, E. G. KAsTENHUBER. 

